Aircraft Operations. Volume II - Construction of Visual and Instrument ...

II-4-1-App A-4 Procedures — Aircraft Operations — Volume II
where: h1 = height above facility in thousands of feet;
23/11/06
γl = 1/2 cone angle in degrees; and
z = radius of the cone effect area in nautical miles.
6.5 Minimum usable DME ground distance calculation formula
dm = hl tan 55°
where: hl = height above the facility in thousands of metres; and
or
dm = minimum usable DME ground distance in kilometres
dm = 0.164 hl tan 55°
where: hl = height above the facility in thousands of feet; and
dm = minimum usable DME ground distance in nautical miles.
where: h = altitude in thousands of metres;
or
6.6 Wind velocity calculation formula
w = 12 h + 87
w = wind speed in kilometres per hour (up to 220)
w=2h+47
where: w = wind speed in knots (up to 120); and
h = altitude in thousands of feet.